AVG Internet Security...Setup error

Other posting (https://support.avg.com/answers?id=906b0000000D4VFAA0).
AVG Guru

Service 'AVG Firewall' (avgfws) could not be stopped. Verify that you have sufficient privileges to stop system services.

I cannot upgrade my program. I cannot uninstall AVG to reinstall. What now?  HELP!!!

Jeff

Other posting (https://support.avg.com/answers?id=906b0000000D4VFAA0).
AVG Guru